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How to Start a Mazda with a Dead Key Fob
There are several methods for starting a Mazda vehicle that has a dead battery in the key fob. We start with the most recent models, which use the simplest method.
- But first, if you are still locked outside, click here.
- Second, you can find video help here!
- Finally, if you need or want another manufacturer, click here.
Getting Your Mazda Started
Mazda uses three versions of keyless start systems, and so there are three back up start options. So, here’s the scoop.
All models post 2015
The CX5 was the first model to use Method 3 and by 2016 all Mazda models use this method. Push the brake pedal, or the clutch pedal if you have a manual transmission. This will cause the indicator light in the Start / Stop button to flash green. While it flashes, touch the back side of the key fob to the Start / Stop button, which will cause the green indicator light to stop flashing and remain lit. Push the Start / Stop button to start the engine as normal – or with the fob itself.
Older CX7, CX9, MX-5, RX8
Method 2 is found in the CX7, CX9, MX-5 and RX8 models. Remove the Start knob cover by pushing both release buttons and pulling the cover off exposing the key cylinder. Slide the auxiliary key out from the bottom of the advanced key (see above) and insert it into the cylinder. Turn the key to start the engine.
Pre-2014 Mazda3, Mazda6
For Method 1, found in the Mazda3 (including MazdaSpeed3) and Mazda6 prior to 2014, slide the auxiliary key out from the bottom of the advanced key (see above). Use the auxiliary key to remove the key slot cover located on the right side of the steering column. Depress the clutch (manual) or brake pedal (automatic) until the ring around the key slot starts flashing. Insert the auxiliary key into the slot while it is flashing, but do not turn the auxiliary key in the slot. Press the push button start to start the engine.
Note: If you have made an attempt to start the vehicle without success, there may be residual pressure in the brake system and a new warning light may appear (left) or text message to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Or wait a few minutes and try again.
Models examined include CX5, CX9, CX30, Miata, Mazda3, Mazda6, and MX 5. Model years 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, and 2025.
… Return to Part I, Getting In
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The information on this website is provided for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 30+ years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s, ME: MS, RPI, NY